<script setup>
import { ref, onMounted } from 'vue'
import { queryPageApi, addApi, queryByIdApi, updateApi, deleteApi } from '@/api/user'
import { queryAllApi } from '@/api/dept'
import { queryAllApi as queryAllRoleApi } from '@/api/role'
import { ElMessage, ElMessageBox } from 'element-plus'
import { Search, Refresh, Plus, Delete, Edit } from '@element-plus/icons-vue'

// 查询参数
const queryParams = ref({
  name: '',
  phone: '',
  deptId: '',
  status: '',
  page: 1,
  pageSize: 10
})

// 表格数据
const userList = ref([])
const total = ref(0)

// 部门列表
const deptList = ref([])

// 角色列表
const roleList = ref([])

// 弹框相关
const dialogFormVisible = ref(false)
const formTitle = ref("")
const formLabelWidth = '80px'

// 表单数据
const user = ref({
  username: '',
  name: '',
  phone: '',
  email: '',
  gender: '',
  status: '',
  deptId: '',
  roleId: '',
  image: '',
  remark: ''
})

// 表单引用
const userFormRef = ref(null)

// 表格选择相关
const multipleSelection = ref([])

// 表单校验规则
const rules = ref({
  username: [
    { required: true, message: '用户名不能为空', trigger: 'blur' },
    { min: 2, max: 20, message: '长度应在 2 - 20 字符之间', trigger: 'blur' }
  ],
  name: [
    { required: true, message: '姓名不能为空', trigger: 'blur' },
    { min: 2, max: 20, message: '长度应在 2 - 20 字符之间', trigger: 'blur' }
  ],
  phone: [
    { required: true, message: '手机号不能为空', trigger: 'blur' },
    { pattern: /^1[3-9]\d{9}$/, message: '请输入正确的手机号', trigger: 'blur' }
  ],
  email: [
    { required: true, message: '邮箱不能为空', trigger: 'blur' },
    { min: 5, max: 50, message: '长度应在 5 - 50 字符之间', trigger: 'blur' },
    { type: 'email', message: '请输入正确的邮箱格式', trigger: 'blur' }
  ],
  gender: [
    { required: true, message: '性别不能为空', trigger: 'change' }
  ],
  status: [
    { required: true, message: '状态不能为空', trigger: 'change' }
  ]
})

// 搜索
const search = async () => {
  const result = await queryPageApi(queryParams.value);
  if (result.code == 1) {
    userList.value = result.data.rows
    total.value = result.data.total
  } 
}

// 清空
const clear = () => {
  queryParams.value = {
    name: '',
    phone: '',
    deptId: '',
    status: '',
    page: 1,
    pageSize: 10
  }
  search()
}

const token = ref("")
// 初始化
onMounted(async () => {
  // 获取部门列表
  const deptResult = await queryAllApi()
  if (deptResult.code == 1) {
    deptList.value = deptResult.data
  }
  
  // 获取角色列表
  const roleResult = await queryAllRoleApi()
  if (roleResult.code == 1) {
    roleList.value = roleResult.data
  }

  token.value = localStorage.getItem('token')
  search()
})

// 分页大小改变
const handleSizeChange = (val) => {
  queryParams.value.pageSize = val
  queryParams.value.page = 1
  search()
}

// 页码改变
const handleCurrentChange = (val) => {
  queryParams.value.page = val
  search()
}

// 获取性别显示文本
const getGenderText = (gender) => {
  return gender === 1 ? '男' : '女'
}

// 获取状态显示文本
const getStatusText = (status) => {
  return status === 1 ? '正常' : '停用'
}

// 获取状态显示样式
const getStatusType = (status) => {
  return status === 1 ? '' : 'danger'
}

// 添加用户
const handleAdd = () => {
  dialogFormVisible.value = true
  formTitle.value = "新增用户"
  user.value = {
    username: '',
    name: '',
    phone: '',
    email: '',
    gender: '',
    status: '',
    deptId: '',
    roleId: '',
    image: '',
    remark: ''
  }
  
  if (userFormRef.value) {
    userFormRef.value.resetFields()
  }
}

// 修改用户
const handleEdit = async (id) => {
  const result = await queryByIdApi(id)
  if (result.code == 1) {
    dialogFormVisible.value = true
    formTitle.value = "修改用户"
    user.value = result.data
    
    if (userFormRef.value) {
      userFormRef.value.resetFields()
    }
  } else {
    ElMessage.error('数据获取失败')
  }
}

// 保存用户
const save = () => {
  userFormRef.value.validate(async (valid) => {
    if (valid) {
      let result
      if (user.value.id) { // 修改
        result = await updateApi(user.value)
      } else { // 添加
        // 设置默认密码：用户名+123
        user.value.password = user.value.username + '123'
        result = await addApi(user.value)
      }
      
      if (result.code == 1) {
        ElMessage.success(user.value.id ? '修改成功' : '添加成功')
        dialogFormVisible.value = false
        search()
      } else {
        ElMessage.error(user.value.id ? '修改失败' : '添加失败')
      }
    } else {
      ElMessage.error('请填写正确的数据')
    }
  })
}

// 删除用户
const handleDelete = (id) => {
  ElMessageBox.confirm('您确认要删除该用户吗', '提示', {
    confirmButtonText: '确定',
    cancelButtonText: '取消',
    type: 'warning'
  }).then(async () => {
    const result = await deleteApi(id)
    if (result.code == 1) {
      ElMessage.success('删除成功')
      search()
    } else {
      ElMessage.error('删除失败')
    }
  }).catch(() => {
    ElMessage({
      type: 'info',
      message: '删除已取消'
    })
  })
}

// 批量删除
const handleBatchDelete = () => {
  if (multipleSelection.value.length === 0) {
    ElMessage.warning('请选择要删除的用户')
    return
  }
  ElMessageBox.confirm(`您确认要删除选中的 ${multipleSelection.value.length} 个用户吗?`, '提示', {
    confirmButtonText: '确定',
    cancelButtonText: '取消',
    type: 'warning'
  }).then(async () => {
    const ids = multipleSelection.value.map(item => item.id)
    const result = await deleteApi(ids)
    if (result.code == 1) {
      ElMessage.success('批量删除成功')
      search()
    } else {
      ElMessage.error('批量删除失败')
    }
  }).catch(() => {
    ElMessage({
      type: 'info',
      message: '批量删除已取消'
    })
  })
}

// 表格选择变化
const handleSelectionChange = (selection) => {
  multipleSelection.value = selection
}

// 头像上传相关
const handleAvatarSuccess = (response, file) => {
  user.value.image = response.data
}

const beforeAvatarUpload = (file) => {
  const isJPG = file.type === 'image/jpeg' || file.type === 'image/png'
  const isLt2M = file.size / 1024 / 1024 < 2

  if (!isJPG) {
    ElMessage.error('上传头像图片只能是 JPG/PNG 格式!')
  }
  if (!isLt2M) {
    ElMessage.error('上传头像图片大小不能超过 2MB!')
  }
  return isJPG && isLt2M
}
</script>

<template>
  <div class="user-management">
    
    <!-- 搜索区域 -->
    <el-form :inline="true" :model="queryParams" ref="queryForm" class="search-form">
      <el-form-item label="姓名:">
        <el-input v-model="queryParams.name" placeholder="请输入姓名" />
      </el-form-item>
      <el-form-item label="手机号:">
        <el-input v-model="queryParams.phone" placeholder="请输入手机号" />
      </el-form-item>
      <el-form-item label="部门:">
        <el-select v-model="queryParams.deptId" placeholder="请选择" clearable style="width: 200px">
          <el-option v-for="dept in deptList" :key="dept.id" :label="dept.name" :value="dept.id" />
        </el-select>
      </el-form-item>
      <el-form-item label="状态:">
        <el-select v-model="queryParams.status" placeholder="请选择" clearable style="width: 200px">
          <el-option label="正常" :value="1" />
          <el-option label="停用" :value="0" />
        </el-select>
      </el-form-item>
      <el-form-item class="search-buttons">
        <el-button type="primary" @click="search"><el-icon><Search /></el-icon>搜索</el-button>
        <el-button type="info" @click="clear"><el-icon><Refresh /></el-icon>清空</el-button>
      </el-form-item>
    </el-form>
    
    <!-- 操作按钮区域 -->
    <div class="operation-area">
      <el-button type="primary" @click="handleAdd"><el-icon><Plus /></el-icon>添加用户</el-button>
      <el-button type="danger" @click="handleBatchDelete"><el-icon><Delete /></el-icon>批量删除</el-button>
    </div>

    <!-- 表格区域 -->
    <el-table :data="userList" style="width: 100%" border @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="60" align="center" />
      <el-table-column prop="name" label="姓名" width="120" align="center" />
      <el-table-column prop="username" label="用户名" width="120" align="center" />
      <el-table-column label="头像" width="120" align="center">
        <template #default="scope">
          <el-avatar 
            :size="40" 
            :src="scope.row.image" 
            :alt="scope.row.name"
          />
        </template>
      </el-table-column>
      <el-table-column prop="deptName" label="部门" width="150" align="center" />
      <el-table-column prop="roleName" label="角色" width="150" align="center" />
      <el-table-column prop="phone" label="手机号" width="150" align="center" />
      <el-table-column label="状态" width="120" align="center">
        <template #default="scope">
          <el-tag :type="getStatusType(scope.row.status)">
            {{ getStatusText(scope.row.status) }}
          </el-tag>
        </template>
      </el-table-column>
      <el-table-column prop="updateTime" label="最后操作时间" width="200" align="center" />
      <el-table-column label="操作" align="center">
        <template #default="scope">
          <el-button type="primary" link @click="handleEdit(scope.row.id)">
            <el-icon><Edit /></el-icon>修改
          </el-button>
          <el-button type="danger" link @click="handleDelete(scope.row.id)">
            <el-icon><Delete /></el-icon>删除
          </el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 分页区域 -->
    <div class="pagination">
      <el-pagination
        v-model:current-page="queryParams.page"
        v-model:page-size="queryParams.pageSize"
        :page-sizes="[10, 20, 30, 40, 50]"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
      />
    </div>

    <!-- 添加/修改用户对话框 -->
    <el-dialog v-model="dialogFormVisible" :title="formTitle" width="800px" center>
      <el-form :model="user" :rules="rules" ref="userFormRef" :label-width="formLabelWidth">
        <!-- 两列布局的表单字段 -->
        <div class="form-row">
          <!-- 左列 -->
          <div class="form-column">
            <el-form-item label="用户名:" prop="username" required>
              <el-input v-model="user.username" placeholder="请输入用户名" />
            </el-form-item>
            
            <el-form-item label="手机号:" prop="phone" required>
              <el-input v-model="user.phone" placeholder="请输入手机号" />
            </el-form-item>
            
            <el-form-item label="性别:" prop="gender" required>
              <el-select v-model="user.gender" placeholder="请选择" style="width: 100%">
                <el-option label="男" :value="1" />
                <el-option label="女" :value="0" />
              </el-select>
            </el-form-item>
            
            <el-form-item label="部门:">
              <el-select v-model="user.deptId" placeholder="请选择" style="width: 100%">
                <el-option v-for="dept in deptList" :key="dept.id" :label="dept.name" :value="dept.id" />
              </el-select>
            </el-form-item>
          </div>
          
          <!-- 右列 -->
          <div class="form-column">
            <el-form-item label="姓名:" prop="name" required>
              <el-input v-model="user.name" placeholder="请输入姓名" />
            </el-form-item>
            
            <el-form-item label="邮箱:" prop="email" required>
              <el-input v-model="user.email" placeholder="请输入邮箱" />
            </el-form-item>
            
            <el-form-item label="状态:" prop="status" required>
              <el-select v-model="user.status" placeholder="请选择" style="width: 100%">
                <el-option label="正常" :value="1" />
                <el-option label="停用" :value="0" />
              </el-select>
            </el-form-item>
            
            <el-form-item label="角色:">
              <el-select v-model="user.roleId" placeholder="请选择" style="width: 100%">
                <el-option v-for="role in roleList" :key="role.id" :label="role.name" :value="role.id" />
              </el-select>
            </el-form-item>
          </div>
        </div>
        
        <!-- 头像上传区域 -->
        <el-form-item label="头像:">
          <div class="avatar-section">
            <el-upload
              class="avatar-uploader"
              action="/api/upload"
              name="image"
              :headers="{'token': token}" 
              :show-file-list="false"
              :on-success="handleAvatarSuccess"
              :before-upload="beforeAvatarUpload"
            >
              <img v-if="user.image" :src="user.image" class="avatar" />
              <el-icon v-else class="avatar-uploader-icon"><Plus /></el-icon>
            </el-upload>
            <div class="upload-tip">
              <p>图片上传,支持扩展名: .png / .jpg / .jpeg</p>
              <p>大小限制: 2M</p>
            </div>
          </div>
        </el-form-item>
        
        <!-- 备注说明区域 -->
        <el-form-item label="备注说明:">
          <el-input 
            v-model="user.remark" 
            type="textarea" 
            :rows="3" 
            placeholder="请输入用户的备注信息,最多200字"
            maxlength="200"
            show-word-limit
          />
        </el-form-item>
      </el-form>

      <template #footer>
        <div class="dialog-footer">
          <el-button type="primary" @click="save">确定</el-button>
          <el-button type="info" @click="dialogFormVisible = false">取消</el-button>
        </div>
      </template>
    </el-dialog>
  </div>
</template>

<style scoped>
.user-management {
  padding: 20px;
  background-color: #fff;
  min-height: 100%;
  border-radius: 8px;
}

.operation-area {
  margin: 20px 0;
}

.search-form {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

.search-form :deep(.el-form-item) {
  margin-right: 20px;
  margin-bottom: 10px;
  min-width: 200px;
}

.search-buttons {
  margin-left: auto !important;
  min-width: auto !important;
}

.pagination {
  margin-top: 20px;
  display: flex;
  justify-content: flex-end;
}

:deep(.el-button .el-icon) {
  margin-right: 4px;
}

/* 头像上传样式 */
.avatar-uploader {
  text-align: center;
  flex-shrink: 0; /* 防止头像区域被压缩 */
}

.avatar-uploader .el-upload {
  border: 1px dashed #d9d9d9;
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: var(--el-transition-duration-fast);
}

.avatar-uploader .el-upload:hover {
  border-color: var(--el-color-primary);
}

.avatar-uploader-icon {
  font-size: 28px;
  color: #8c939d;
  width: 80px;
  height: 80px;
  text-align: center;
  line-height: 80px;
}

.avatar {
  width: 80px;
  height: 80px;
  display: block;
}

.upload-tip {
  flex: 1;
  margin-top: 0; /* 移除之前的顶部边距 */
  font-size: 12px;
  color: #999;
  line-height: 1.5;
}

.upload-tip p {
  margin: 2px 0;
}

/* 对话框样式 */
:deep(.el-dialog__header .el-dialog__title) {
  color: #409EFF;
}

.dialog-footer {
  text-align: center;
}

/* 新增的样式，用于两列布局 */
.form-row {
  display: flex;
  gap: 20px; /* 列之间的间距 */
  margin-bottom: 20px; /* 行之间的间距 */
}

.form-column {
  flex: 1; /* 使列占据相同的空间 */
}

.avatar-section {
  display: flex;
  align-items: flex-start;
  gap: 15px; /* 头像和提示之间的间距 */
}
</style>
